on this thread here but you didn't get any responses.
I have a feeling that Optus probably billed you incorrectly and doesn't want to admit it.
I am going to lock the other thread because it is a duplicate.
My daughter got charged from Optus for a phone call she never made from her home, she doesn't even use Optus. She was advised to contact her server. Following is her email to them ..
does anyone have a solution to this please? she has just put on Zone Alarm Security Suite 6, will this be enough??
"I have just been talking to Optus as I received a bill from them when we don't even have an account with them, it was for an international call. The gentleman I spoke to said that what happens is that if you get on to a corrupt site that there are hackers who can do what he called modem jacking (& he called it something else) where they are able to extract your phone details & use them at a later date. He suggested that I contact you, my internet service provider, & find out what I can do to protect my modem from future attacks like this. I have just purchased Zone Alarm Internet Security Suite 6, is this going to be enough or is there something extra that I can do to protect my modem further. The gentleman at optus said you may have a specific firewall for this type of thing??